Reamer



w. A. ABEG@ 1,848,404

BEAMER Filed sept. 1s, 1929 2 sheets-sheet 1 March 8, 1932.

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v Mardi 8, 1932- W. A. ABEGG 1,848,404.

`Fi eeeeeeeeeeeeeeeeeeeeeeeeeeee t 2 y y' f Patented Mar. .8,1 1932uN-ifrenf stares y 1,843,4c4f

'earner eserce- WALTER YA, Annee; or yrios ANGELES, cemrenma,y'assrenoia or cnn-HALF rro B.

c nnrnnonn, or Los Amenities, cerimoniale c nennen l Application ledSeptember 18, 1929.4 Serial No. 393,439.

larly effective and practical as appliedto a reamer., c Y Y vAnotherobject of this inventionis to pro-y vide va simple, practical and secureconstrucc.orthelike.."'c" kA nfurther object of the present' inventionis to provide a simple, convenienti and practical reamer constructionwhereby the cutter unit canrbe mounted various kdistances from ,n theyaxis of the tool so that itwill operate to tion for mountin'ga cutterunit in a reamer,v

725 ream a well bore to different sizes, as desired.

The various objects and features of myinventionL willbe best and moreAfully understood from the following detailed description of atypicalform and application'of the inv A vent-ion, throughout which descriptionreference is hady to the accompanying drawings, in

which: Y Y Y `y Fig. v1 is a longitudinal detailed sectional view ofthebody of thereamerconstruction provided by the invention showing thecutter unit and cutter mounting removed. Fig. 2

is a longitudinal detailed sectional view of the reamer showing thecutter unit being assembledwith the body. Figl is a view simi- 40 lar toFig. 2 showing the cutter unit in operating position in the body. Figs.4,5 and 6 are detailed transverse sectional views of thek constructiontaken on lines L /l, 5-5 and 6 6, respectively, on Fig. 3.r Fig. 'isanend view of one of the pin supporting collars', and

Figs. 8 to 11 inclusive are' more or less diagrammatic viewsillustratingvarious settings of the collar.

` The construction provided by this inven- 50 tion being particularlyapplicable to a well tapered screw-threaded piniprojection while rangedin various manners, for instance, they reamer, such, for example, asisusually operated above or in connection with a drilling rbit, l willconfine 4the present disclosure to a reamer of this type, it beingunderstood that the broader principles of the invention are not to beconsidered limited to the details disclosed.Y c A L The constructionprovided by the invention includes, generally, a body 10, a cutterassem-` bly or unit l1, and means l2 for detachably connecting the body;10 and cutter unit llso that the cutting parts of the unit'proj ect'fromthe bo dylO ina mannerto engage the torina-i` tion throughwhich the toolis operated.

Iln the case of awell reainer such asis illustratedinthe drawings,thebody 10 is an elonigate member, preferably a unitary member, provided atits upper and lower ends with screw-threaded parts 13 andllrespectively, adapted to facilitate connection with4 adj oin-y ing partssuch as the'parts of a well drilling string. at one end of the body isrin the form ofa the part 14 at the other end of the body is in 75 thenature of a tapered screw-threaded socket adapted to receive a pinprojection. l/Vhere the reainer is to be operated with the usual Yrotary method of drilling a central longitudinal circulation openingy16. may. extend through the body from one endv to the other as clearlyshown in Figs. 1, 2 and 3 of the drawings.` ln accordance with 'the'present invention the side wall of the body is provided with one or morerecesses 15 to receive cutter units. ln the usualv reamer I provide aplurality of cutter-Carrying recesses 15, it being obvious that therecesses may bearmay be spaced or located in various positionslongitudinally or' the body and maybe locate-drin various positionsaround the body. in the particular case illustrated there are threerecesses 15 in the same location longitudinally, of the body and Vspacedapart around the body so that the body is symmetf rical in cross sectionas isf clearly shown'V in Fig. 5 of the drawings. Y v

A cutter unit 11 embodying the present invention includes, generally,apinv 17, one or In the case illustrated the ypart 13 c more cutters 18rotatably carried by the pin, and heads 19 fixed on the ends of the pinto hold the cutters against displacement. In the particular case shownthere is a plurality of cutters 18 on the pin 17, the end cutters, thatis, the cutters adjacent the heads 19, being bevelled as clearly shownin Figs. 2 and 3 of the drawings. The cutters 13 may be toothed rollercutters of the type ordinarily employed in hard rock drills. The heads19 may be fixed on the ends of the pin in any suitable manner, forinstance, they may be secured in place by transverse pins or keys 20.The keys 2O may be iitted so that they can be driven into and out 'ofplace when it is desired to remove the cutters from the pin 17. Theheads 19 fit the recess so that they are held against rotation. Theheads may be polygonal in cross sectional configuration, for instance,square, and they may be seated in correspondingly shaped parts ot therecess. It is to be understood, of course, that the pin 17 and thecutters supported by the pin are proportioned so that the cutter unit isof such length and diameter as to be properly accommodated by the bodyrecess 15.

The means 12, provided by the present invention for detachablyconnecting the cutter unit'with the body so that it is positioned in thebody recess 1,5 and projects from the body in the desired manner,includes, generally,

lugs or projections 22 extending from the outer ends of the heads 19 ofthe cutter unit, a socket 23 in one end of the bodyrecess 15, andaretaining block 24 detachably connectedto the body at the other end ofthe recess and provided with a socket 25 to receive the pvnpjection atthe other end of the cutter unit.

e projections 22 are made sufficiently long and heavy to effectivelyhold the cutter unit in the body. In the arrangement shown the socket 23is at the lower end of the recess 15, and to facilitate manufacture thesocket is formed in a block of material 26 which is formed with thesocket and then welded or otherwise permanently united with the body tobecome solid or substantially integral therewith.

The retaining block 24 is located at the upper end of the recess 15 andis preferably in the nature of an elongate block adapted to seat in anextension 15a of the recess 15` as clearly shown throughout thedrawings. The socket 25 isin the lower end of the block 24. In practicevarious means may be provided for detachably connecting the block 24with the body 10. In the form of the invention illustratcd the block isheld in position by screw means, for instance, a cap screw 30 isarranged through an opening 31 in the block and screw threads into anopening 32 in the bottom of the recess extension 15a. In theconstruction just described the cut-ter unit or assembly is firstpositioned so that the projection 22 at its lower end enters the socket23 at the lower end of the recess 15. While the upper end portion of thecutter unit is tilted outwardly or away from the body, the retainingblock 24 is applied to the cutter unit so that the projection 22 on theupper end of the cutter unit projects into the socket 25. The cutterunit with the retaining block 24 can then be swung into operatingposition so that the retaining block 24 seats in the recess extension15a. With theblock thus positioned, the cap screw 30 is arranged inplace to secure the block against displacement from the recess 15a. Itwill be obvious that the cap screw may be provided with suitable lockwashers or locking means so that it will not work loose and that thehead ofthe screw may be countersunk in the block so that it does notproject in amanner to interfere with the action of the tool.

In the preferred form of the invention the cutter unit is supportedintermediate its ends, for instance, ribs are provided across the recess15 at points intermediate the ends of the recess andy openings ornotches 41 are provided inthe ribs to receive collars 42 on the pin ofthe cutter unit. The .collars 42 are arranged on the pin between thecutters and operate as spacers to divide the cutters into spaced groups,as shown throughout the drawings. The exteriors of the collarspreferably correspond in shape to the heads 19, for instance, they maybe square. The collars are adapted to fity into correspondingly shapednotches 41 inthe ribs 40 and are thus held against rotation. Theconfiguration of the collars and the mannerin which they fit the notchesin the ribs 40 is clearly `illustrated throughout the drawings. l y

In accordance withL the present invention, they construction abovedescribed hask the parts related so that the cutter unit can be mountedin various positions with reference to the body, for instance, atvarious distances from the central axis of the body. In the form of theinvention illustrated the in receiving openings in the heads are o setor eccentric to the exteriors of the heads while the projections 22 areconcentric with the exteriors of the heads. With this construction, bysetting the heads in different rotative po sitions in the body recess,the pin 17 is supported in different positions or diierent distancesfrom the central axis of the body. When this feature is embodied in theconstruction, the collars 42 are constructed so that the pin carryingopenings are eccentric to the exteriors of the collars. When t-he headsand collars are square the pin receiving holes are preferably located sothat the pins can be set four different distances from the center of thebody.

In Figs. 7 to 11, inclusive, of the drawings, I illustrate the featuresof this invention just described. The relationing of parts of the headsbeing the same as in the collars I will make detailed reference to thecollars only.

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The pin receiving holeis positioned with reference to the exterior ofthis collar so that its axis is offset or removed different distancesfrom lines drawn at right angles to the exterior surfaces of the collarto intersect at the center of this collar. In the drawings, lines a-mand y-z/ are drawn at right Vangles to the exterior surfaces of thiscollar and intersect at the center of the collar. The point .edesignates the center ofthe pin receiving hole. Lines l-ml and g/- Q/lare drawn parallel with the lines :rand jz/-g/ respectively-andintersect at the point e. 'Ihe 'differencein spacing of lines and ml-Jrand lines y-g/ and y1-fz/1 illustrates the relationingof the point ewith relation to the center of the collar.

From the foregoing description it will be apparent that I have provideda reamer construction which is extremely simple and inexpensive ofmanufacture, convenient to handle andV operate, and efficient anddependable. The cutter unitscan be applied to `or detached from the bodyeasily and quickly and the various parts of the construction are simpleand inexpensive ofmanufacture making the tool practical and suitable forgeneral use. It will be obvious that the cutter units,

mounted as provided by this invention, are

' over ordinary reamer constructions. The

cutter carrying pin being supported at points intermediate its ends maybe comparatively small .in diameter and is effectively held againstbending.

' f Y Having described only a typical, preferred form of my invention,Ido not wish to limit myself to the specific details set forth, but

n wish to reserve to myselfvany changes or a pin, a cutter carried bythe pin, heads at the f ends of the pin, Vand lugs projecting from theheads, one iof the Vlugs extending 'into the socket, yand a memberdetachably connected with the body and having an opening holding theother lug. Y l y 3. In a tool of the characterV described, a body havingnotches with fiat walls, a cutter unit including a'cutter carrying pin,square heads on the krpin tting the notches, andY f holding one ofthelugsand adapted tobeconnected with the body.- a i 5. In a tool ofthecharacter describe-d, a body having rectangular'notches, a cutter unitincluding a cutter'carrying pin, heads on the pin square in crosssection and adapted to fit said notches, means connecting the unit withthe bodyy with the headsy rigidly held in the notches, and meanssupporting the unit intermediate its ends including blocks on the pinsquare in .crossl section and fitting rectangular notches in the body,the pin being eccentric to the headsv and blocks.

6. In a tool of the character described, a body having notches, a cutterunit including a cutter carrying pin, heads on the pin, means detachablyconnecting the unit with the body with the heads stationarily-held inthe notches, andy-means supporting the unit intermediate its endsincluding yblocks on the pin removably tting notches in ribs on thebody.

7 A well tool of thecharacter described including, a body having notcheswith flattened n cutter unit may be rigidly mounted at differentdistances from the center ofthe body,in cluding heads having flattenedsides to fit in said notches and having openings yreceiving the ends ofthe pin eccentric to their exteriors.

8. A Well tool of the character described including, abody havingnotches, a cutter unit including apin and a cutter carried by the pin,and means whereby the cuttery unit may be mounted at different distancesfrom the center of the body, including heads fitting the notchessothatthey are held against movement, and having openings eccentric totheir exteriors receiving `the ends of the pin.

9. A Well reamer including, an elongated body, a cutter unit including apin, and a cutter rotatable on the pin, means for mounting one end ofthe pin on the body, and means for mounting the other end of the pin onthe body for adjustment radially of the body or circumferentially of thebody.

10. A well reamerincluding, an elongated "Y body, a cutter unitincluding a pin, anda l rectangular n'otch in the body, and means fordetachably holding the block in the notch, the longitudinal axis of thepin being eccentric to the block. k5 `11. In a tool of the characterdescribed, a.

body .having notches of rectangular transversecross Section, a cutterunit including :l cutter carrying pin, heads on the pin, the heads beingof square cross section and being 13 adapted to fit the notches, andmeans detachably connecting the unit with the body with the headsrigidly held in the notches7 the longitudinal axis of the pin beingeccentric to the heads and located unequal distances from ad- !5 joiningsides of the notches.

In Witness that I claim the foregoing I have hereunto subscribed my namethis 24th day of July, 1929.

WALTER A. ABEGG.

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